public static function getMIMEImgReg() { if (MIME::$MIMEImgReg == "") { MIME::$MIMEImgReg = "/" . join("|", array_map(function ($item) { return preg_replace("/\\./", "\\.", $item) . "\$"; }, array_keys(MIME::$MIMEImgTable))) . "/"; } return MIME::$MIMEImgReg; }